public class Test_1 {
    public static void main(String[] args) {
        System.out.println("hello wrold");
        System.out.println(true);
        System.out.println(Integer.MIN_VALUE);
        System.out.println(Integer.MAX_VALUE);
        System.out.println(Integer.MAX_VALUE+2);
        //int 范围在2147483647~-2147483647
        //当超出范围时如果是正数就会像一个圆圈一样走到负数的最大值那里
        System.out.println(Long.MAX_VALUE);
        System.out.println(Long.MIN_VALUE);
        long a=2165_43543_543L;
        System.out.println(a);
        //关于浮点
        int b=8;
        double f=5;
        System.out.println(b/f);
    }
}
